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feat(ble): Added API to get low power clock source

pull/9873/merge
xiongweichao 2023-12-22 17:25:00 +08:00
rodzic e83ed8b345
commit d47b2e4612
2 zmienionych plików z 222 dodań i 190 usunięć
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401
components/bt/controller/esp32c3/bt.c
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@ -73,12 +73,12 @@ enum {
typedef union {
struct {
uint32_t enable : 1; // whether low power mode is required
uint32_t lpclk_sel : 2; // low power clock source
uint32_t lpclk_sel : 3; // low power clock source
uint32_t mac_bb_pd : 1; // whether hardware(MAC, BB) force-power-down is required during sleep
uint32_t wakeup_timer_required : 1; // whether system timer is needed
uint32_t no_light_sleep : 1; // do not allow system to enter light sleep after bluetooth is enabled
uint32_t main_xtal_pu : 1; // power up main XTAL
uint32_t reserved : 25; // reserved
uint32_t reserved : 24; // reserved
};
uint32_t val;
} btdm_lpcntl_t;
@ -401,7 +401,7 @@ static DRAM_ATTR uint8_t btdm_lpcycle_us_frac = 0;
// semaphore used for blocking VHCI API to wait for controller to wake up
static DRAM_ATTR QueueHandle_t s_wakeup_req_sem = NULL;
// wakeup timer
static DRAM_ATTR esp_timer_handle_t s_btdm_slp_tmr;
static DRAM_ATTR esp_timer_handle_t s_btdm_slp_tmr = NULL;
#ifdef CONFIG_PM_ENABLE
static DRAM_ATTR esp_pm_lock_handle_t s_pm_lock;
@ -1154,6 +1154,147 @@ static void IRAM_ATTR btdm_mac_bb_power_up_cb(void)
}
#endif
// init low-power control resources
static esp_err_t btdm_low_power_mode_init(esp_bt_controller_config_t *cfg)
{
esp_err_t err = ESP_OK;
do {
// set default values for global states or resources
s_lp_stat.val = 0;
s_lp_cntl.val = 0;
s_lp_cntl.main_xtal_pu = 0;
s_wakeup_req_sem = NULL;
s_btdm_slp_tmr = NULL;
// configure and initialize resources
s_lp_cntl.enable = (cfg->sleep_mode == ESP_BT_SLEEP_MODE_1) ? 1 : 0;
s_lp_cntl.lpclk_sel = (cfg->sleep_mode == ESP_BT_SLEEP_MODE_1) ? cfg->sleep_clock : ESP_BT_SLEEP_CLOCK_MAIN_XTAL;
s_lp_cntl.no_light_sleep = 0;
if (s_lp_cntl.enable) {
#if CONFIG_MAC_BB_PD
if (!btdm_deep_sleep_mem_init()) {
err = ESP_ERR_NO_MEM;
break;
}
s_lp_cntl.mac_bb_pd = 1;
#endif
#ifdef CONFIG_PM_ENABLE
s_lp_cntl.wakeup_timer_required = 1;
#endif
// async wakeup semaphore for VHCI
s_wakeup_req_sem = semphr_create_wrapper(1, 0);
if (s_wakeup_req_sem == NULL) {
err = ESP_ERR_NO_MEM;
break;
}
btdm_vnd_offload_task_register(BTDM_VND_OL_SIG_WAKEUP_TMR, btdm_sleep_exit_phase0);
if (s_lp_cntl.wakeup_timer_required) {
esp_timer_create_args_t create_args = {
.callback = btdm_slp_tmr_callback,
.arg = NULL,
.name = "btSlp",
};
if ((err = esp_timer_create(&create_args, &s_btdm_slp_tmr)) != ESP_OK) {
break;
}
}
// set default bluetooth sleep clock cycle and its fractional bits
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 2 << (btdm_lpcycle_us_frac);
if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_EXT_32K_XTAL) { // External 32 kHz XTAL
// check whether or not EXT_CRYS is working
if (rtc_clk_slow_freq_get() != RTC_SLOW_FREQ_32K_XTAL) {
ESP_LOGW(BT_LOG_TAG, "32.768kHz XTAL not detected, fall back to main XTAL as Bluetooth sleep clock");
s_lp_cntl.lpclk_sel = ESP_BT_SLEEP_CLOCK_MAIN_XTAL;
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
}
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_RTC_SLOW) { // Internal 136kHz RC oscillator
if (rtc_clk_slow_freq_get() == RTC_SLOW_FREQ_RTC) {
ESP_LOGW(BT_LOG_TAG, "Internal 136kHz RC oscillator. The accuracy of this clock is a lot larger than 500ppm which is "
"required in Bluetooth communication, so don't select this option in scenarios such as BLE connection state.");
} else {
ESP_LOGW(BT_LOG_TAG, "Internal 136kHz RC oscillator not detected.");
assert(0);
}
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_MAIN_XTAL) {
ESP_LOGI(BT_LOG_TAG, "Bluetooth will use main XTAL as Bluetooth sleep clock.");
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
}
} else {
s_lp_cntl.no_light_sleep = 1;
}
bool select_src_ret __attribute__((unused));
bool set_div_ret __attribute__((unused));
if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_MAIN_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_ON));
s_lp_cntl.main_xtal_pu = 1;
#endif
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL);
set_div_ret = btdm_lpclk_set_div(rtc_clk_xtal_freq_get());
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 1 << (btdm_lpcycle_us_frac);
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_EXT_32K_XTAL) {
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL32K);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = (RTC_CLK_CAL_FRACT > 15) ? (1000000 << (RTC_CLK_CAL_FRACT - 15)) :
(1000000 >> (15 - RTC_CLK_CAL_FRACT));
assert(btdm_lpcycle_us != 0);
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_RTC_SLOW) {
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = esp_clk_slowclk_cal_get();
} else {
err = ESP_ERR_INVALID_ARG;
break;
}
#if CONFIG_SW_COEXIST_ENABLE
coex_update_lpclk_interval();
#endif
#ifdef CONFIG_PM_ENABLE
if (s_lp_cntl.no_light_sleep) {
if ((err = esp_pm_lock_create(ESP_PM_NO_LIGHT_SLEEP, 0, "btLS", &s_light_sleep_pm_lock)) != ESP_OK) {
break;
}
ESP_LOGW(BT_LOG_TAG, "light sleep mode will not be able to apply when bluetooth is enabled.");
}
if ((err = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "bt", &s_pm_lock)) != ESP_OK) {
break;
} else {
s_lp_stat.pm_lock_released = 1;
}
#endif
} while (0);
return err;
}
esp_bt_sleep_clock_t esp_bt_get_lpclk_src(void)
{
if (btdm_controller_status != ESP_BT_CONTROLLER_STATUS_INITED &&
btdm_controller_status != ESP_BT_CONTROLLER_STATUS_ENABLED) {
return ESP_BT_SLEEP_CLOCK_NONE;
}
return s_lp_cntl.lpclk_sel;
}
esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
{
esp_err_t err = ESP_FAIL;
@ -1189,6 +1330,10 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
ESP_LOGE(BT_LOG_TAG, "SLEEP_MODE_1 enabled but sleep clock not configured");
return ESP_ERR_INVALID_ARG;
}
if (cfg->sleep_clock > ESP_BT_SLEEP_CLOCK_RTC_SLOW) {
ESP_LOGE(BT_LOG_TAG, "SLEEP_MODE_1 is enabled but this sleep clock is not supported");
return ESP_ERR_INVALID_ARG;
}
}
// overwrite some parameters
@ -1214,133 +1359,10 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
ESP_LOGI(BT_LOG_TAG, "BT controller compile version [%s]", btdm_controller_get_compile_version());
// init low-power control resources
do {
// set default values for global states or resources
s_lp_stat.val = 0;
s_lp_cntl.val = 0;
s_lp_cntl.main_xtal_pu = 0;
s_wakeup_req_sem = NULL;
s_btdm_slp_tmr = NULL;
// configure and initialize resources
s_lp_cntl.enable = (cfg->sleep_mode == ESP_BT_SLEEP_MODE_1) ? 1 : 0;
s_lp_cntl.no_light_sleep = 0;
if (s_lp_cntl.enable) {
#if CONFIG_MAC_BB_PD
if (!btdm_deep_sleep_mem_init()) {
err = ESP_ERR_NO_MEM;
goto error;
}
s_lp_cntl.mac_bb_pd = 1;
#endif
#ifdef CONFIG_PM_ENABLE
s_lp_cntl.wakeup_timer_required = 1;
#endif
// async wakeup semaphore for VHCI
s_wakeup_req_sem = semphr_create_wrapper(1, 0);
if (s_wakeup_req_sem == NULL) {
err = ESP_ERR_NO_MEM;
goto error;
}
btdm_vnd_offload_task_register(BTDM_VND_OL_SIG_WAKEUP_TMR, btdm_sleep_exit_phase0);
}
if (s_lp_cntl.wakeup_timer_required) {
esp_timer_create_args_t create_args = {
.callback = btdm_slp_tmr_callback,
.arg = NULL,
.name = "btSlp",
};
if ((err = esp_timer_create(&create_args, &s_btdm_slp_tmr)) != ESP_OK) {
goto error;
}
}
// set default bluetooth sleep clock cycle and its fractional bits
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 2 << (btdm_lpcycle_us_frac);
// set default bluetooth sleep clock source
s_lp_cntl.lpclk_sel = BTDM_LPCLK_SEL_XTAL; // set default value
#if CONFIG_BT_CTRL_LPCLK_SEL_EXT_32K_XTAL
// check whether or not EXT_CRYS is working
if (rtc_clk_slow_freq_get() == RTC_SLOW_FREQ_32K_XTAL) {
s_lp_cntl.lpclk_sel = BTDM_LPCLK_SEL_XTAL32K; // External 32 kHz XTAL
} else {
ESP_LOGW(BT_LOG_TAG, "32.768kHz XTAL not detected, fall back to main XTAL as Bluetooth sleep clock");
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
}
#elif (CONFIG_BT_CTRL_LPCLK_SEL_MAIN_XTAL)
ESP_LOGI(BT_LOG_TAG, "Bluetooth will use main XTAL as Bluetooth sleep clock.");
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
#elif (CONFIG_BT_CTRL_LPCLK_SEL_RTC_SLOW)
// check whether or not internal 150 kHz RC oscillator is working
if (rtc_clk_slow_freq_get() == RTC_SLOW_FREQ_RTC) {
s_lp_cntl.lpclk_sel = BTDM_LPCLK_SEL_RTC_SLOW; // Internal 150 kHz RC oscillator
ESP_LOGW(BT_LOG_TAG, "Internal 150kHz RC osciallator. The accuracy of this clock is a lot larger than 500ppm which is "
"required in Bluetooth communication, so don't select this option in scenarios such as BLE connection state.");
} else {
ESP_LOGW(BT_LOG_TAG, "Internal 150kHz RC oscillator not detected.");
assert(0);
}
#endif
bool select_src_ret __attribute__((unused));
bool set_div_ret __attribute__((unused));
if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_ON));
s_lp_cntl.main_xtal_pu = 1;
#endif
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL);
set_div_ret = btdm_lpclk_set_div(rtc_clk_xtal_freq_get());
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 1 << (btdm_lpcycle_us_frac);
} else if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL32K) {
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL32K);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = (RTC_CLK_CAL_FRACT > 15) ? (1000000 << (RTC_CLK_CAL_FRACT - 15)) :
(1000000 >> (15 - RTC_CLK_CAL_FRACT));
assert(btdm_lpcycle_us != 0);
} else if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_RTC_SLOW) {
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = esp_clk_slowclk_cal_get();
} else {
err = ESP_ERR_INVALID_ARG;
goto error;
}
#if CONFIG_SW_COEXIST_ENABLE
coex_update_lpclk_interval();
#endif
#ifdef CONFIG_PM_ENABLE
if (s_lp_cntl.no_light_sleep) {
if ((err = esp_pm_lock_create(ESP_PM_NO_LIGHT_SLEEP, 0, "btLS", &s_light_sleep_pm_lock)) != ESP_OK) {
err = ESP_ERR_NO_MEM;
goto error;
}
ESP_LOGW(BT_LOG_TAG, "light sleep mode will not be able to apply when bluetooth is enabled.");
}
if ((err = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "bt", &s_pm_lock)) != ESP_OK) {
err = ESP_ERR_NO_MEM;
goto error;
} else {
s_lp_stat.pm_lock_released = 1;
}
#endif
} while (0);
if ((err = btdm_low_power_mode_init(cfg)) != ESP_OK) {
ESP_LOGE(BT_LOG_TAG, "Low power module initialization failed");
goto error;
}
#if CONFIG_SW_COEXIST_ENABLE
coex_init();
@ -1378,69 +1400,70 @@ esp_err_t esp_bt_controller_deinit(void)
return ESP_OK;
}
// deinit low power control resources
static void btdm_low_power_mode_deinit(void)
{
#if CONFIG_MAC_BB_PD
if (s_lp_cntl.mac_bb_pd) {
btdm_deep_sleep_mem_deinit();
s_lp_cntl.mac_bb_pd = 0;
}
#endif
#ifdef CONFIG_PM_ENABLE
if (s_lp_cntl.no_light_sleep) {
if (s_light_sleep_pm_lock != NULL) {
esp_pm_lock_delete(s_light_sleep_pm_lock);
s_light_sleep_pm_lock = NULL;
}
}
if (s_pm_lock != NULL) {
esp_pm_lock_delete(s_pm_lock);
s_pm_lock = NULL;
s_lp_stat.pm_lock_released = 0;
}
#endif
if (s_lp_cntl.wakeup_timer_required && s_btdm_slp_tmr != NULL) {
if (s_lp_stat.wakeup_timer_started) {
esp_timer_stop(s_btdm_slp_tmr);
}
s_lp_stat.wakeup_timer_started = 0;
esp_timer_delete(s_btdm_slp_tmr);
s_btdm_slp_tmr = NULL;
}
if (s_lp_cntl.enable) {
btdm_vnd_offload_task_deregister(BTDM_VND_OL_SIG_WAKEUP_TMR);
if (s_wakeup_req_sem != NULL) {
semphr_delete_wrapper(s_wakeup_req_sem);
s_wakeup_req_sem = NULL;
}
}
if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_MAIN_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
if (s_lp_cntl.main_xtal_pu) {
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_OFF));
s_lp_cntl.main_xtal_pu = 0;
}
#endif
btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
btdm_lpclk_set_div(0);
#if CONFIG_SW_COEXIST_ENABLE
coex_update_lpclk_interval();
#endif
}
btdm_lpcycle_us = 0;
}
static void bt_controller_deinit_internal(void)
{
periph_module_disable(PERIPH_BT_MODULE);
// deinit low power control resources
do {
#if CONFIG_MAC_BB_PD
if (s_lp_cntl.mac_bb_pd) {
btdm_deep_sleep_mem_deinit();
s_lp_cntl.mac_bb_pd = 0;
}
#endif
#ifdef CONFIG_PM_ENABLE
if (s_lp_cntl.no_light_sleep) {
if (s_light_sleep_pm_lock != NULL) {
esp_pm_lock_delete(s_light_sleep_pm_lock);
s_light_sleep_pm_lock = NULL;
}
}
if (s_pm_lock != NULL) {
esp_pm_lock_delete(s_pm_lock);
s_pm_lock = NULL;
s_lp_stat.pm_lock_released = 0;
}
#endif
if (s_lp_cntl.wakeup_timer_required) {
if (s_lp_stat.wakeup_timer_started) {
esp_timer_stop(s_btdm_slp_tmr);
}
s_lp_stat.wakeup_timer_started = 0;
esp_timer_delete(s_btdm_slp_tmr);
s_btdm_slp_tmr = NULL;
}
if (s_lp_cntl.enable) {
btdm_vnd_offload_task_deregister(BTDM_VND_OL_SIG_WAKEUP_TMR);
if (s_wakeup_req_sem != NULL) {
semphr_delete_wrapper(s_wakeup_req_sem);
s_wakeup_req_sem = NULL;
}
}
if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
if (s_lp_cntl.main_xtal_pu) {
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_OFF));
s_lp_cntl.main_xtal_pu = 0;
}
#endif
btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
btdm_lpclk_set_div(0);
#if CONFIG_SW_COEXIST_ENABLE
coex_update_lpclk_interval();
#endif
}
btdm_lpcycle_us = 0;
} while (0);
btdm_low_power_mode_deinit();
esp_bt_power_domain_off();
#if CONFIG_MAC_BB_PD

11
components/bt/include/esp32c3/include/esp_bt.h
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@ -289,7 +289,7 @@ typedef struct {
uint8_t sleep_clock; /*!< controller sleep clock */
uint8_t ble_st_acl_tx_buf_nb; /*!< controller static ACL TX BUFFER number */
uint8_t ble_hw_cca_check; /*!< controller hardware triggered CCA check */
uint16_t ble_adv_dup_filt_max; /*!< maxinum number of duplicate scan filter */
uint16_t ble_adv_dup_filt_max; /*!< maximum number of duplicate scan filter */
bool coex_param_en; /*!< deprecated */
uint8_t ce_len_type; /*!< connection event length computation method */
bool coex_use_hooks; /*!< deprecated */
@ -600,6 +600,15 @@ void esp_wifi_bt_power_domain_on(void);
*/
void esp_wifi_bt_power_domain_off(void);
/**
* @brief Get the Bluetooth module sleep clock source.
*
* Note that this function shall not be invoked before esp_bt_controller_init()
*
* @return clock source used in Bluetooth low power mode
*/
esp_bt_sleep_clock_t esp_bt_get_lpclk_src(void);
#ifdef __cplusplus
}
#endif